CN107848601A - Ship - Google Patents

Abstract

Following regions are set to the 1st region（R1）, the region is on ship（1）Fore-and-aft direction be from Fore Perpendicular（F.P.）Rearward away from length between perpendiculars（Lpp）0.5% position（Sx1）With from Fore Perpendicular（F.P.）Rearward away from length between perpendiculars（Lpp）2% position（Sx2）Between region, and in ship（1）Above-below direction on be Load Line（WL）With exposure deck（13）Between region, now, be configured in bow frame line（Xi）In any one in, the length in certain tilt line portion is directed to each single side of a ship as more than the 2% of the molded breadth of the ship, the bow frame line with ship（1）The vertical section of fore-and-aft direction in represent the 1st region（R1）The shape of interior hull surface, the certain tilt line portion are the bow frame lines（Xi）Tangent line（Lx）With vertical（Lz）Formed inclination angle（α）Angle from upside is more than 65 degree.Thus, the flow efficiency for making to be provided with the water at the bow portion opened outside bow rearward flows well, reduces the resistance increase made in the increase and wave of wave resistance, and possess the wide exposure deck of width.

Description

Ship

Technical field

The present invention relates to ship, the ship has the flow efficiency that can make to be provided with the water at the bow portion opened outside bow good Rearward flow well, the resistance increase made in the increase and wave of wave resistance can be reduced and can to possess width wide The bow shape on exposure deck.

Background technology

In the ship of displacement type, the shape near bow front end is bow shape to reduce needed for the propulsion of ship Energy, it is desirable to for make that wave resistance is small and wave caused by resistance increase also few shape.

If the bow shape is loose, the water capacity that bow portion is flowed into when ship advances easily is blocked, and the water surface is because dynamic Press and rise, so producing big water surface ripple, make wave resistance and become big.In addition, in wave, make incidence wave significantly anti-forwards Penetrate, cause big resistance increase.

Therefore, in the bow shape of ship, near Load Line and than its shape on the lower, except bow ball Outside the part of bow, the front end in bow portion is nearby designed to less loose.

On the other hand, in the opening position than Load Line by the top, prevented from the waterflooding caused by wave and personnel From the viewpoint of the damage of assembly parts and goods on safety, deck and deck prevents, it is desirable to even in wave reclaimed water also not Easily to reaching exposed deck.On this basis, from the viewpoint of the configuration of machinery is tethered at, also require that the width on exposure deck is wide To a certain degree.Therefore, as shown in Fig. 6 ~ Fig. 8, in the ship 1X of prior art, for exposure deck 13（Z4）Neighbouring ship The width of body, in order that the width of the hull at exposure deck 13 broadens, the somewhat top position near than Load Line WL Putting Pc and rising makes the top situations that broaden and formed more, turns into place more upper than the Load Line WL in bow portion, above ratio A 14X outside wide bow below.

Setting outside the bow in the case of a 14X, in conventional ship 1X, eaten as shown in fig. 6, employing from fully loaded The waterline of waterline WL position（Horizontal cross-section line）Z0 to exposure deck 13 waterline Z4, bow frame line（Hull line）X1~X4 The shape gently to broaden upward, make bow frame line X1 ~ X4 inclined angle alpha near Fore Perpendicular F.P. relative to Vertical is substantially smaller than 40 degree.Therefore, the front in bow portion be from the waterline Z0 of Load Line WL position somewhat Rise with upward skidding and then become loose shape in top part.

The limitation for the total length being additionally, since in the ship for the restriction for coming from bay etc., it is also necessary to do not make structure compare ship Fore perpendicular F.P. is protruded more than certain length forwards.Using the limitation it is strict, structure is leaned on than Fore Perpendicular F.P. In the case of the so-called no ball bow ship type that preceding place does not protrude nearly or completely, the waterline Z0 of the position than Load Line WL Top shape is as shown in the oval shaped portion of Fig. 8 single dotted broken line, and waterline Z1 ~ Z4 is near front end relative to hull center line Close to vertical, it has to as extreme loose shape.In this case, outside bow the front end geometry of a 14X with perpendicular to The plane of ship 1X fore-and-aft direction approaches.The tendency becomes special in the Full Ship such as Block Coefficient Cb more than 0.75 Significantly.

Such notable loose ship of the forward end more top than Load Line navigates by water in wave, by wave is led The variation of the water surface elevation of cause and the oscillation in the pitch mode of hull, teeter, and cause top more than the Load Line of forward end Part and the water surface collide, now, produced due to forward end it is big make ripple, further, since forward end incidence wave is by forwards Strength reflects, and hull resistance is significantly increased.

In addition, in the notable plane for becoming fore-and-aft direction loose and perpendicular to ship of the forward end more top than Load Line In the case that the ship of close shape is absorbed in state as described above in wave, rise near forward end along hull surface Even if water reach the height on exposed deck, the amount of exercise also almost can not with the front further towards ship, so to sudden and violent The possibility for revealing waterflooding on deck is high.In the case of the waterflooding is significant, except to the personnel on exposure deck, goods, assembling Outside part damages, the damage on deck and the immersion into ship are produced in severe cases.

Hypertrophyization countermeasure as the front end geometry of outside the bow, it is proposed that several to make the ship more top than Load Line The loose structure of first shape invariance.

As one of them, for example, as described in Japanese publication JP 2000-142553 publications, it is proposed that one Kind Full Ship, in the Full Ship, makes forward end profile significantly tilt forwards, makes than maximum at place more top than extreme draft line The front end of the top waterline of water line nearby turns into acute angle.However, in the Full Ship, in the front end from Fore Perpendicular to ship Distance untill position limited it is short in the case of, the inclined scope of forward end profile can be made also to diminish.Therefore, without ball In the case of the deck that width more than one fixed width is set in bow ship type or ship proximate to it, exist in the Full Ship The problem of major part hypertrophyization of the forward end on extreme draft line can not be avoided such.

In addition, for example, as described in Japanese publication JP 2000-335478 publications, it is proposed that from Fore Perpendicular Distance to the front end of ship is short and is being the hypertrophy of acute angle near forward end at all waterlines more top than extreme draft line Ship.However, in the Full Ship, the scheme that the wide deck of width is set near forward end is not provided, so in the presence of can not adopt With the situation of the Full Ship it is more such the problem of.

In addition, for example, as described in Japanese publication JP 2003-160090 publications, it is proposed that the front end of ship Substantially uniform with Fore Perpendicular and untill upper deck height waterline is the bow shape of the ship of acute angle.Moreover, for example, As described in Japanese publication spy's table 2012-517931 publications, it is proposed that on the structure of spherical bow, the spherical ship It is acute angle that head, which has the substantially forward end profile of vertical and all waterlines more top than spherical bow,.However, with the ship There is also can not apply the problem of such when needing the wide deck of width for the relevant structure of bow shape, spherical bow.

As described above, in the ship of prior art, any one limitation in practical is all relatively strong, the ship that can be applied As narrow scope, the shape in following bow portions is not known, and the shape in the bow portion especially exists in the ship of extensive main points Loose degree is high and squeezes into the condition prevented, width without in ball bow ship type or ship proximate to it, fully meet to include wave Spend the condition on wide exposure deck, to above-mentioned each condition including prominent condition prevented of the front of structure etc..

Patent document 1：Japanese publication JP 2000-142553 publications.

Patent document 2：Japanese publication JP 2000-335478 publications.

Patent document 3：Japanese publication JP 2003-160090 publications.

Patent document 4：Japanese publication spy's table 2012-517931 publications.

The content of the invention

The present invention is in view of above-mentioned condition and made, and its object is to provide a kind of ship, the ship has and can made Flow efficiency provided with the water at the bow portion of outside bow rearward flows well, the increase of making wave resistance can be reduced and Resistance in wave increases and can possess the bow shape on the wide exposure deck of width.

For realizing that the ship of purpose as described above is configured to, following regions are set to the 1st region, the region is on this The fore-and-aft direction of ship be from Fore Perpendicular rearward 0.5% position away from length between perpendiculars with it is rearward remote from Fore Perpendicular The region between position from the 2% of length between perpendiculars, and be Load Line and exposure deck on the above-below direction of the ship Between region, now, in any one in bow frame line, the length in certain tilt line portion is directed to each single side of a ship as should More than the 2% of the molded breadth of ship, the bow frame line represent the described 1st in the section vertical with the fore-and-aft direction of the ship The shape of hull surface in region, the certain tilt line portion be the bow frame line tangent line and vertical formed by incline Angle of the oblique angle from upside is more than 65 degree of part.

According to the structure, in bow shape, the major part for making to open outside the bow near Fore Perpendicular is relative to vertical Direction be inclined to the angle bigger than the ship of prior art, specifically more than 65 degree, so hull can be made from than exposure The part of deck somewhat on the lower is risen and broadened, and makes the loose degree on the Load Line near forward end smaller than prior art, and The hull shape that can make to expose near deck is formed as the wide shape of width.

Also, the loose degree of bow is small untill on Load Line, so even in such as ship in wave Air China In the case that row, ripple are relative to the local collision very more top than Load Line to forward end, it can also make to produce with forward end Give birth to the increase of the associated hull resistance of ripple and with making the increase of the associated hull resistance of incident wave reflection in forward end than existing The ship of technology is small.

On the other hand, the ship exposure deck near width it is wide, so can readily insure that the width on exposed deck, And prevent from exposing the waterflooding on deck.

In addition, the front end opened outside bow is not nearby the face of vertical in the underface on exposure deck, but relative to vertical Direction is with inclined face forwards to a certain degree, so being navigated by water even in the ship in wave, water is along before outside bow In the case that end nearby rises to exposed deck nearby, water also along upside, move forwards by inclined face, so can obtain Amount of exercise forward.Therefore, in the case that water exceedes exposure altitude above deck, the possibility in waterflooding to exposure deck Diminish.

In other words, in S.S.（Bisector）In arbitrary bow frame line between 9.95 ~ S.S.9.80, meet gradient More than 2% such condition of molded breadth for each single side of a ship for more than 65 degree of sections be present.That is, in the ship of the structure In oceangoing ship, in the wide scope from Load Line to the part somewhat on the lower on exposure deck, it can make near forward end The bottom of bow frame line narrows, so more paramount than NO part, the rising of i.e. narrow part with the ship of prior art Position.

In the prior art, firmly believe and easily damaged in wave proximate to the bow frame line of level in Fore Perpendicular Wound, so it is unshakable rule to be not provided with close to horizontal bow frame line, but in the structure shown here by force using above-mentioned Structure and be positioned proximate in the bow frame line of level, so as to which the loose part near forward end is only defined in as needing Be formed as the very near position on the exposure deck of the wide part of width, hull resistance can be reduced, and ripple can be reduced Squeeze into deck.

In addition, for the upper limit of inclination angle and the length of the width in certain tilt line portion, the knot generally in ship On structure, the upper limit at inclination angle is 90 degree naturally, and the upper limit of the length of the width in certain tilt line portion is 50%, but in order to The impulsive force caused by wave is more relaxed, the upper limit at inclination angle is preferably less than 85 degree, the width in certain tilt line portion Length be preferably less than 40%.

In above-mentioned ship, if the hull surface that the certain tilt line portion being configured in the 1st region is formed In more than 50% and less than 100% part formed using applicable surface, then have the effect that.

A situation formed in the prior art by the surface configuration for needing three-dimensional bending machining is more outside bow, but root According to the structure, the main part opened outside bow is formed using applicable surface, it is only two-dimentional so as to which the major part of outside plate is set as The part of ground bent flat plate, so the bending machining of hull surface becomes easy, although the shape with outside the bow of prior art Shape is dramatically different, but can easily make, and can significantly reduce the machining period opened outside bow, can reduce processing cost.

In above-mentioned ship, if be configured to, the difference of the height of Load Line and exposure deck at by forward end Be set to altitude datum, by the 1st region, the altitude datum higher than Load Line on above-below direction in the ship 50% reference horizontal line and Load Line between region when being set to 1 lower area, have more than the 2% of the molded breadth Certain tilt line portion the bow frame line in the 1st lower area, most by hull central side position with most leaning on The distance in the beam of hull direction between the position of side of a ship side is less than the 4% of the molded breadth, then has the effect that.

In the prior art, the bow frame line near Fore Perpendicular becomes from the somewhat top position of Load Line Width, but according to the structure, the bow shape on the water surface can be made until with being formed as acute angle untill Load Line same degree. Particularly, untill the part somewhat on the lower on exposure deck, the horizontal cross-section line of hull and the position of Load Line Horizontal cross-section line is same shape, so from sight as the suppression of the caused suppression of ripple and the reflection of incidence wave Point sets out, and the shape of the scope is all rationalized, and resistance increase significantly diminishes, and can particularly reduce the hull resistance in wave Power.

In addition, in above-mentioned ship, if be configured to, Load Line and the height on exposure deck at by forward end Difference be set to altitude datum, by the 1st region on the above-below direction of the ship benchmark higher than Load Line When region between 50% reference horizontal line and Load Line of height is set to 1 lower area, there is the following ship First frame line, in the bow frame line in the certain tilt line portion of more than 2% with the molded breadth any one it In, in the 1st lower area, with vertical formed by inclination angle be less than ± 10 degree of part with the altitude datum More than 25% height exist, then have the effect that.In addition, it should be less than ± 10 degree with inclination angle formed by vertical Part both can be linear, or in the curve of substantially linear.

According to the structure, it is configured to the lower portion on bow frame line, with the straight line of vertical or proximate to it inclines Oblique angle is less than ± 10 degree of shape, rises to bending part, the bending part is the inclination angle relative to vertical Angle starts increased part, so the waterplane shape near forward end is until the position top more than Load Line Only, it is and the waterplane shape same shape at Load Line.Thus, hull resistance is smaller.Meanwhile forward end is attached Near hull shape is simple shape, and workability is improved, and working cost is also reduced by.

In addition, the inclination angle of the lower portion of the bow frame line is less than ± 10 degree, for example, will be from vertical In the case that downside is defined as just as the angle of inner side, lower limit is minus 10 degree, and the upper limit is positive 10 degree.In addition, on the inclination The length of the part at angle, the 25% of height on the basis of lower limit, usually more than the 30% of altitude datum, preferably more than 40%, more Preferably more than 50%.

In addition, in above-mentioned ship, if be configured to, Load Line and the height on exposure deck at by forward end Difference be set to altitude datum, by the 1st region on the above-below direction of the ship benchmark higher than Load Line When region between 50% reference horizontal line of height and exposure deck is set to 1 upper area, there is the following bow Frame line, among any one in the bow frame line in the certain tilt line portion of more than 2% with the molded breadth, It is concavity and the 8% of the molded breadth that the 1st upper area incurvature radius is the ship during in the presence of from the outside of the ship Following recess, or flex point be present, then have the effect that.

In the prior art, the bow frame line opened outside bow is typically made up of smooth curve or straight line, even if ship The radius of curvature of first frame line sets somewhat small recess, and it is also at the immediately above of Load Line, but according to the structure, leads to Cross and combined with said structure, being capable of constriction hull so as to which the loose part near forward end is defined in into narrower range The scope widened towards deck, the majority of the waterline in bow portion is set as acute angle and excellent shape in fluid force. That is the advantages of being brought using above-mentioned certain tilt line portion can be obtained to greatest extent.If using in conventional line chart The gentle curve being frequently seen, then hull looseization, above-mentioned advantage from more than deck position on the lower must be made to be cut It is weak.

In above-mentioned ship, if be configured to, following regions are set to the 2nd region, before and after the region is on the ship Direction is the rearward region between 2% position away from length between perpendiculars and the front end of the ship from Fore Perpendicular, and On the above-below direction of the ship for Load Line and exposure deck between region, now, in the 2nd region, with In any one in cross section curve obtained from the parallel arbitrary face cut-out hull surface of hull median plane, not with vertical line Between long more than 0.5% length exist the cross section curve tangent line and vertical formed by part of the inclination angle more than 50 degree, Then have the effect that.

According to the structure, in the case where dimensionally observing, the hull surface of a part is relative to vertical outside bow Not there is no king-sized inclination compared with the ship of prior art, so downward even in the rising of wave reclaimed water or forward In the case of colliding the water surface outside Fang Yundong and bow, the impact that a surface is subject to by water outside bow terminates in and prior art Ship identical degree.

That is, in the prior art, firmly believe above-mentioned certain tilt line portion close to the ship of the bow frame line of level Body and water surface angulation are small, big by impact during ripple, still, it is known that near forward end, even if making bow framework Line will not also become so big, such hull surface and water surface institute close to level relative to the angle of inclination of vertical Into angle it is also little, impulsive force caused by ripple is also the ship identical degree with prior art.This is in the prior art Do not know.

Also, in above-mentioned ship, if the Block Coefficient of the ship is more than 0.75, or Fore Perpendicular and the ship are most The distance of front end is more than zero and is less than the 1% of length between perpendiculars, i.e., in loose degree height or without ball bow ship type or proximate to it In ship type, using the design of prior art, the front end opened outside bow is nearby particularly easy to become loose, so the feelings using the technology Effect under condition especially becomes big.

According to the ship of the present invention, at forward end, not only ensure to expose the width needed for deck, the ship with prior art Oceangoing ship is compared, and also makes to make wave resistance and resistance in waves increase reduces, so the energy in the case of being navigated by water in actual marine site Consumption is fewer than the ship of prior art.

In addition, be not easy to waterflooding in wave to exposure deck, thus the damage and immersion of ship, to personnel and The possibility of the harm of goods is small.Moreover, in the case of colliding the water surface outside bow, the impact that is subject to by water be with it is existing The ship identical degree of technology, so while bow frame line significantly tilts, but it can damage in the absence of outside bow special Possibility, vibration, noise caused by the impact from water also terminate in the ship identical degree with prior art.

Brief description of the drawings

Fig. 1 is the cross-section of fore-and-aft direction in the ship for schematically illustrate embodiments of the present invention, by ship Hull shape front view.

Fig. 2 is at longitudinal section in the ship for schematically illustrate embodiments of the present invention, by the width of ship Hull shape side view.

Fig. 3 is the horizontal cross-section of short transverse in the ship for schematically illustrate embodiments of the present invention, by ship The top view of the hull shape at place.

Fig. 4 is Fig. 1 partial enlarged drawing.

Fig. 5 is Fig. 2 partial enlarged drawing.

Fig. 6 is the hull shape of the cross-section of fore-and-aft direction in the ship for schematically illustrate prior art, by ship The front view of shape.

Fig. 7 is in the ship for schematically illustrate prior art, by the hull shape at the longitudinal section of the width of ship The side view of shape.

Fig. 8 is in the ship for schematically illustrate prior art, by the hull at the horizontal cross-section of the short transverse of ship The top view of shape.

Embodiment

Hereinafter, referring to the drawings, the ship of embodiment involved in the present invention is illustrated.The ship of the embodiment It is the ship 1 in the displacement type of the bow shape as shown in Fig. 1 ~ Fig. 5.

Also, for the ship 1, as shown in Fig. 2 following regions are set into the 1st region R1, the region is on ship 1 Fore-and-aft direction is 0.5% position from Fore Perpendicular F.P. rearward away from length between perpendiculars Lpp（Bisector（Square Station）S.S.9.95）Sx1 and 2% position from Fore Perpendicular F.P. rearward away from length between perpendiculars Lpp（Bisector S.S.9.80）Region Xr between Sx2, and be Load Line WL and exposure deck 13 on the above-below direction of the ship 1 Between region Zr.

Also, as shown in Fig. 2 and Fig. 4, it will be set to from Load Line WL altitude datums Hs 50% high horizontal line During reference horizontal line Zh, the region between in the 1st region R1, Load Line WL and reference horizontal line Zh is set to the 1st Lower area R1b, the region between in the 1st region R1, reference horizontal line Zh and exposure deck 13 is set to the 1st upper zone Domain R1a.

In addition, the as shown in figure 4, shape that will be opened in each section vertical with the fore-and-aft direction of the ship 1 outside expression bow The line of shape is set to bow frame line X1 ~ X4（It is Xi below）, the position that angle of the inclined angle alpha from upside is more than 65 degree is set For certain tilt line portion, the inclined angle alpha by bow frame line Xi tangent line Lx and vertical Lz institute into.In addition, generally, In the structure of ship 1, the upper limit of inclined angle alpha is 90 degree, but the upper limit at inclination angle is preferably less than 85 degree.

In addition, as shown in figure 5, following regions are set into the 2nd region R2, the region on the fore-and-aft direction of ship 1 be from 2% position Sx2s of the Fore Perpendicular F.P. rearward away from length between perpendiculars Lpp and ship 1 front end Fm（It is and ship in Figure 5 Fore perpendicular F.P. identicals position）Between region Xf, and be Load Line WL and exposure on the above-below direction of ship 1 Region Zr between deck 13.

Also, in the present invention, first, as shown in Fig. 1 and Fig. 4, it is configured in bow frame line X1 ~ X4（Below For Xi）In arbitrary bow frame line Xj in, the length in certain tilt line portion is directed to each single side of a ship as the molded breadth Bm's of ship More than 2%.In addition, the upper limit of the length of the width in the certain tilt line portion is 50%, but preferably less than 40%.

Thus, as shown in Fig. 1 and Fig. 4, in bow shape, make to open 14 master outside the bow near Fore Perpendicular F.P. The big angles of the ship 1X of such as Fig. 6 than prior art, specifically 65 are partly inclined to relative to vertical Lz More than degree, so thus, making until forward end Fm（It is Fore Perpendicular F.P. in the structure of Fig. 1 ~ Fig. 5）It is neighbouring fully loaded to eat Loose degree untill near waterline WL is smaller than the ship 1X of prior art, makes hull from the part than exposed deck 13 somewhat on the lower P rises and broadened, and so as to make the loose degree on the Load Line WL near forward end smaller than prior art, and can make sudden and violent Hull shape near dew deck 13 is formed as the wide shape of width.

Also, the loose degree of bow is small untill on Load Line WL, so even in the ship 1 in wave Air China In the case that row, ripple collide forward end Fm at the part top more than Load Line WL, it can also make and forward end Fm Produce the increase of the associated hull resistance of ripple and the increase ratio with reflecting the associated hull resistance of incidence wave at forward end Fm The ship 1X of prior art is small.

On the other hand, the width near the exposure deck 13 of the ship 1 is wide, so exposed deck 13 can be readily insured that Width and prevent from exposing the waterflooding on deck 13.

In addition, as shown in Fig. 2 14 front end is not nearby the face of vertical in the underface on exposure deck 13 outside bow, But relative to vertical with inclined face to a certain degree, so being navigated by water even in the ship 1 in wave, water is along bow In the case that the front end of outer 14 nearby rises to exposed deck 13 nearby, water also along upside, move forwards by inclined face, So amount of exercise forward can be obtained.Therefore, in the case of the height that exposure deck 13 is exceeded even in water, waterflooding to exposure first Possibility on plate 13 also diminishes.

In other words, in S.S.（Bisector）In arbitrary bow frame line Xj between 9.95 ~ S.S.9.80, meet following Such condition：Certain tilt line portion as the section that gradient is more than 65 degree is directed to each single side of a ship and has the 2% of molded breadth Bm More than.That is, in the ship 1, can be near forward end Fm, from Load Line WL to exposure deck 13 In the wide scope untill the P of part somewhat on the lower, bow frame line Xj bottom is set to be formed as narrow shape, so unloose Part can rise to the position higher than the ship 1X of the prior art shown in Fig. 6 ~ Fig. 8.

Thus, in the prior art, firmly believe in Fore Perpendicular（F.P.）Near, the bow frame line Xj close to level exists Easily damaged in wave, so it is unshakable rule to be not provided with, but thus, by force using said structure come be positioned proximate in Horizontal bow frame line Xj, be formed as wide as needs so as to which the loose part near forward end Fm is only defined in The very near position on the exposure deck 13 of wide part is spent, hull resistance can be reduced, and ripple can be reduced and squeeze into deck.

In addition, more than 50% and less than 100% in the hull surface that the certain tilt line portion in the 1st region R1 is formed Part is formed using applicable surface.Thus, 14 are opened outside bow in the prior art by the surface configuration shape for the bending machining for needing 3-dimensional Into situation it is more, but by the way that the main part of outside bow 14 is formed using applicable surface, so as to by the big of outside plate Part is set as the only two-dimensionally part of bent flat plate, so the bending machining of hull surface becomes easy, although and prior art Bow outside 14 shape it is dramatically different, but can easily make, 14 machining period can be significantly reduced outside bow, Processing cost can be reduced.

In addition, as shown in figure 4, the bow frame line Xj in be configured to have molded breadth Bm more than 2% certain tilt line portion exists In 1st lower area R1b, position most by hull central side and most by the beam of hull direction between the position of side of a ship side away from From less than 4% that bi is molded breadth Bm.

Thus, in the prior art, somewhat the leaning on from Load Line WL of the bow frame line Xi near Fore Perpendicular F.P On position rise and broaden, but according to the structure, the bow shape on the water surface can be made to form acute angleization until and Load Line WL identical degree.Particularly, the horizontal cross-section line of hull is untill the part P somewhat on the lower on exposure deck 13 and fully loaded The horizontal cross-section line of water line WL position is same shape, so from the anti-of the caused suppression of ripple and incidence wave From the viewpoint of the suppression penetrated is such, the shape of the scope is all rationalized, and resistance increase significantly diminishes, and can particularly subtract Hull resistance in few wave.

In addition, it is configured to that there are following bow frame line Xk, in the certain tilt line portion of more than 2% with molded breadth Bm Among any one in bow frame line Xj, deposited in the 1st lower area R1b with altitude datum Hs more than 25% height In substantially linear part, the substantially linear part is less than ± 10 degree with angle of inclination beta formed by vertical Lz.In addition, on More than the 30% of the length of the part of the angle of inclination beta, usually altitude datum Hs, preferably more than 40%, more preferably 50% with On.

According to the structure, it is configured to the lower portion on bow frame line Xj, with the straight line of vertical or proximate to it Angle of inclination beta is less than ± 10 degree of shape, rises to bending part P, the bending part is inclining relative to vertical Lz The angle of bevel angle α starts increased part, so the waterplane shape near forward end Fm is until more than Load Line WL Turn into and the waterplane shape same shape at Load Line WL untill top part P.Thus, hull resistance is more It is small.Meanwhile the hull shape near forward end Fm is simple shape, workability is improved, and working cost is also reduced by.

Moreover, as shown in Fig. 1 and Fig. 4, it is configured to that there is following bow frame line Xj, in more than 2% with molded breadth Bm Certain tilt line portion bow frame line Xj in any one among, when existing from the outside of ship 1 for concavity and In less than 8% recess for the molded breadth Bm that the 1st upper area R1a incurvature radiuses R is ship 1, or flex point be present.

Thus, in the prior art, outside bow 14 bow frame line Xi typically by smooth curve or straight line structure Into, even if bow frame line Xi radius of curvature R sets somewhat small recess, it is also at the immediately above of Load Line WL, But according to the structure, by being combined with said structure, so as to as shown in Figure 3 by the loose portion near forward end Fm Point be defined in narrower range, can the constriction scope of widening hull towards exposure deck 13, can be by the waterline in bow portion Majority be set as acute angle and excellent shape in fluid force.I.e. it is capable to obtain to greatest extent using above-mentioned The advantages of certain tilt line portion.It is if necessary using the gentle curve being frequently seen in the front line chart of prior art Hull is set to be weakened from more than looseization exposing the position of deck 13 on the lower, above-mentioned advantage.

Also, as shown in Fig. 2 and Fig. 5, it is configured in the 2nd region R2, with parallel with hull median plane any Face cut-out hull surface obtained from any one in cross section curve Y0 ~ Y4, not with the 0.5% of length between perpendiculars Lpp with On length part of the tiltangleθ more than 50 degree be present, the inclination angle by cross section curve Yi tangent line Ly and vertical Lz institute into.In other words, it is configured to part of the tiltangleθ more than 50 degree continuously and less than the 0.5% of length between perpendiculars Lpp.

Thus, in the case where dimensionally observing, outside bow the hull surface of 14 part relative to vertical with The ship of prior art is not compared to having king-sized inclination, so even in the rising of wave reclaimed water or forward downwards Motion and outside bow 14 collide the water surface in the case of, the impact that 14 surface is subject to by water outside bow terminates in and existing skill The ship 1X identical degree of art.

That is, in the prior art, firmly believe the bow frame line Xj's close to level of structure as described above Hull and water surface angulation are small, big by impact during ripple, still, it is known that near forward end Fm, even if making ship First frame line Xj will not also become so big close to level, hull surface relative to vertical Lz angle of inclination, so Hull surface and water surface angulation it is also little, impulsive force caused by ripple is also the ship 1X identicals with prior art Degree.This is not know in the past.

Also, in the front end that the Block Coefficient Cb of the ship 1 is more than 0.75 or Fore Perpendicular F.P. and the ship 1 （Forward end）Fm distance is more than zero and in the case of being less than the 1% of length between perpendiculars Lpp, that is to say, that loose degree it is high, It is or special near 14 front end without in ball bow ship type or ship type proximate to it, being opened using the design of prior art, outside bow Easily become loose, in contrast, especially becoming big using the effect in the case of this technology.

Thus, according to the ship 1 of said structure, at forward end Fm, not only ensure to expose the width needed for deck 13, with The ship 1X of prior art is compared, and also makes to make wave resistance and resistance in waves increase reduces, so being navigated by water in actual marine site In the case of energy expenditure it is fewer than the ship 1X of prior art.

In addition, in wave, water is not easy to waterflooding to exposure deck 13, so the damage and immersion of ship 1, right The possibility of the harm of personnel and goods is small.Moreover, outside bow 14 collide the water surface in the case of, the impact that is subject to by water For the ship 1X identical degree with prior art, so while bow frame line Xj is significantly tilted, but opened in the absence of outside bow The 14 special possibilities that can be damaged, vibration, noise caused by the impact from water also terminate in the ship 1X with prior art Identical degree.

Industrial utilizability

According to the ship of the present invention, at forward end, not only ensure to expose the width needed for deck, the ship phase with prior art Than also making to make wave resistance and resistance in waves increase reducing, so the energy expenditure in the case of being navigated by water in actual marine site It is fewer than the ship of prior art, so many ships can be used in.

Description of reference numerals

1、1X：Ship,

11：Hull bottom,

12：Side plate,

13：Exposure deck,

14、14X：Opened outside bow,

Bm：Molded breadth,

Fm：Front end（Forward end）,

Lx：Tangent line（Cross-section）,

Ly：Tangent line（At lateral section）,

Lz：Vertical,

Hs：Altitude datum（From Load Line to the height on exposure deck）,

P：Than the part of exposed deck somewhat on the lower,

R1：1st region,

R2：2nd region,

Sx1：Rearward 0.5% position away from length between perpendiculars from Fore Perpendicular,

Sx2：Rearward 2% position away from length between perpendiculars from Fore Perpendicular,

WL：Load Line,

X0~X4、Xi、Xj：Bow frame line（Hull line）,

Xf：Region between position Sx2 and front end Fm,

Xr：Region between position Sx1 and position Sx2,

Y0~Y4：Cross section curve obtained from cutting off hull surface with the face parallel with hull median plane,

Z0：The waterline of the position of Load Line（Horizontal cross sectional geometry）,

Z1~Z4：Waterline（Horizontal cross sectional geometry）,

Zh：Reference horizontal line,

Zr：Region between Load Line and exposure deck,

α：Inclination angle formed by the tangent line and vertical on the top of bow frame line（In cross section）,

β：Inclination angle formed by the tangent line and vertical of the bottom of bow frame line（In cross section）,

θ：Inclination angle formed by the tangent line and vertical of cross section curve（In lateral section）.

Claims (8)

1. a kind of ship, the ship is characterised by,

Following regions are set to the 1st region, the region on the fore-and-aft direction of the ship be from Fore Perpendicular rearward away from 0.5% position of length between perpendiculars and the rearward region between 2% position away from length between perpendiculars from Fore Perpendicular, and Region on the above-below direction of the ship between Load Line and exposure deck, now,

In any one in bow frame line, the length in certain tilt line portion is directed to each single side of a ship as the molded breadth of the ship More than 2%, the bow frame line represents the hull in the 1st region in the section vertical with the fore-and-aft direction of the ship The shape on surface, the certain tilt line portion be the bow frame line tangent line and vertical formed by inclination angle from upside Angle be more than 65 degree of part.

2. ship as claimed in claim 1, it is characterised in that

More than 50% and less than 100% part in the hull surface that the certain tilt line portion in 1st region is formed Formed using applicable surface.

3. ship as described in claim 1 or 2, it is characterised in that

The difference of height of Load Line at forward end and exposure deck is set to altitude datum, by it is in the 1st region, Region between reference horizontal line and Load Line is set to the 1st lower area, and the reference horizontal line is above and below the ship The 50% of the altitude datum higher than Load Line on direction, now,

The bow frame line in more than the 2% certain tilt line portion with the molded breadth is in the 1st lower area In, the position most by hull central side and the distance most by the beam of hull direction between the position of side of a ship side are the molded breadth Less than 4%.

4. the ship as described in any one of claim 1 ~ 3, it is characterised in that

The difference of height of Load Line at forward end and exposure deck is set to altitude datum, by it is in the 1st region, Region between reference horizontal line and Load Line is set to the 1st lower area, and the reference horizontal line is above and below the ship The 50% of the altitude datum higher than Load Line on direction, now,

With the following bow frame line, the ship in the certain tilt line portion of more than 2% with the molded breadth Among any one in first frame line, exist in the 1st lower area with more than 25% height of the altitude datum With vertical formed by inclination angle be less than ± 10 degree of part.

5. the ship as described in any one of claim 1 ~ 4, it is characterised in that

The difference of height of Load Line at forward end and exposure deck is set to altitude datum, by it is in the 1st region, Region between reference horizontal line and exposure deck is set to the 1st upper area, upper and lower of the reference horizontal line in the ship The 50% of the altitude datum higher than Load Line upwards, now,

With the following bow frame line, the ship in the certain tilt line portion of more than 2% with the molded breadth Among any one in first frame line, for concavity and in the 1st upper area when existing from the outside of the ship Radius of curvature is less than 8% recess of the molded breadth of the ship, or flex point be present.

6. the ship as described in any one of claim 1 ~ 5, it is characterised in that

Following regions are set to the 2nd region, the region is rearward away from vertical from Fore Perpendicular on the fore-and-aft direction of the ship Region between line between 2% long position and the front end of the ship, and be full-load draft on the above-below direction of the ship Region between line and exposure deck, now,

In the 2nd region, the cross section curve obtained from the arbitrary face cut-out hull surface parallel with hull median plane In any one in, not with more than 0.5% length of length between perpendiculars exist the cross section curve tangent line and vertical Part of the formed inclination angle more than 50 degree.

7. the ship as described in any one of claim 1 ~ 6, it is characterised in that

The Block Coefficient of the ship is more than 0.75.

8. the ship as described in any one of claim 1 ~ 7, it is characterised in that

Fore Perpendicular and the distance of the front end of the ship are more than zero and are less than the 1% of length between perpendiculars.